Sizing die for twisters



NW0 w. R. FORD HAL 2,2225

SIZING DIE FOR TWISTERS Filed July 1, 1940 2 Sheets-Sheet 1 Nov. 19, 19%.- W. R. FORD ETAL 2 SlZlNG DIE FOR TWISTERS led July 1, 35340 2 Sheets-Sheet 2 Patented Nov. 19, 1940 UNITED STATES PATENT OFFICE SIZING DIE FOB. TWISTERS Application July 1, 1940, Serial No. 343,486 10 Claims. (01. 57-138) This invention relates to sizing dies for twisters and, more particularly, to the dies employed in compacting and uniformly sizing a plurality of ends which are to be subsequently twisted to form a thread.

Commercial twisting machines employed in the manufacture of finer threads operate at very high speeds, and since the ends are guided through a stationary guide to the die, these ends all tend, during any particular operation, to occupy the same position in the die. These dies, as usually produced, are formed in two sections at the junction of whichthe sizing opening is formed, one of the sections being provided with a fixed funnel mouth for guiding the ends into the die opening per se. Due to the fact that the ends tend to assume a fixed position in operat-ion, the mouths of the dies become rapidly worn, necessitating their replacement, and in the case of the ordinary construction, replacement of the entire die. This, due to the fact that the dies which must be accurately formed are high priced, results in an increased price in the thread, and this increase in price results not only from the actual cost of the replaced dies but from the fact that their short life renders frequent replacements necessary. Additionally, since the threads tend to out into the funnel mouth and thus form sharp edged grooves, the destruction of the funnel mouth results in frequent breakage of the ends at their passage through the mouth.

An important object of the present invention is the provision in a structure of this character of a die so formed that it is not subject to the rapid destruction met with in the usual type of die and, more specifically, to an arrangement such that the funnel mouth lasts longer than the ordinary die but is, upon failure, replaceable with a minimum loss of time and without replacement of the die per se.

Another object of the invention is the formation of such dies so that the die may be readily produced with a hardened insert in which the forming opening is arranged, thereby again materially reducing the cost of production thereof.

These and other objects we attain by the construction shown in the accompanying drawings wherein, for the purpose of illustration, we have shown a preferred embodiment of our invention and wherein:

Fig. 1 is a fragmentary side elevation of a twister embodying a sizin die constructed in accordance with our invention;

Fig. 2 is a front elevation of the die support; Fig. 3 is a, section on line 3-3 of Fig. 2; Fig. 4 is a view similar to that of Fig. 2 but showing the cap of the die holder swung back to permit removal and replacement of the die;

Fig. 5 is a rear elevation of the die holder showing one of the die sections in the process of removal;

Fig. 6 is a combined perspective of the sections of the die proper; and

Fig. '7 is a front elevation of the guiding or geometric plate.

Referring now more particularly to the drawings, the numeral portion of the frame of a twisting machine, th twisting mechanism per se being omitted since it forms no part of the present invention. Secured to the frame I0 is a bracket II mounting a die support I2 and a geometric or guide plate I3, these elements being adjustable along the bracket and clampable thereon by means of set screws I4 or the like. Within the holder is adjustably supported a sizing die l5 which is illustrated as formed in two sections I6 having a hardened central'core I! in which the die opening I8 is formed. We have determined that this core is best formed from materials having the characteristics of tantalum carbide. As illus- I0 generally designates a 16 trated, one end of this opening is slightly enlarged as at I9 to provide a guide for the converging ends entering the die pening, and the core is of sufficient size that the guide enlargement I 9 may be entirely formed therein.

The holder comprises a main body 20 having guideways 2I in which the die sections are vertically movable and through the upper end of which they may be displaced for replacement by repair dies or dies of other sizes. A cap 22 is hinged to the support body at one side of the upper end thereof and may be secured in position at the opposite side thereof through a removable pin 23. This cap embodies a springpressed yoke 24 adapted to bear upon the upper die section and, having associated therewith a die.

5 accidental displacement of the funnel mouth but which may readily spread apart to permit either removal or replacement thereof. While in the present instancethese arms are merely shown as identical'spring arms, it will be obvious that the j 10 same mounting may be obtained by making either arm solid and the other thereof yieldable.- Iv

It will be obvious that with a structure of this type replacement of either the di itself or of the funnel mouth may be'iefiected' very rapidly.

15 Additionally, the construction; of the funnel mouth as a separate unit enables economic for mation of the die per se, aside from the fact of considerable modification without departing from the spirit of our invention, we do not wish to be understood as limiting ourselves thereto except ashereinafter claimed.

5 We claim:

l. A; guide for twisters comprising aisizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, a stationary guide having openings uniformly spaced ,-about a given axis aligned with the die'opening for guiding'said ends, and a rotatable and vertically, movable funnel mouth disposed adjacent to and converging the ends for entrance into the mouth of said 2. A guide-for twisters. comprising a sizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, a stationary guide hav- 1 ing openings uniformly spacedabout a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for entrance into the mouth of said die,

45 and guiding means for said funnel mouth including ayieldable elementyielding of which permits removal or replacement of said funnel mouth. v Y 3. A guide for twisters comprising a sizing die 50 adapted to receive and compactly form a plui60 disposed adjacent to and converging the ends for entrance into the mouth of said die.

4. A guide for twisters comprising a sizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, said die comprising a pair of similarsections each having a hardened insert in which one-half of the sizing opening is formed, means to hold said sections in assembled relation, a stationary guide having openings uni- ,70 formly spaced about a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for en'- trance into the-mouth of said die, and guiding 75 means for said .funnel mouth including a yieldable element yielding of which permits removal or replacement of said funnel mouth.

5. A guide for twisters comprising a sizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in 5 the form of a thread, a stationary guide having openings uniformly spaced about a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the 10 ends for entrance into the mouth of said die,

a ring in which said funnel mouth is formed, said ring having an annular groove, and a pair of'vertically extending arms carried by the support and loosely and yieldably engaged in the groove of said ring at opposite sides of the ring.

6. A guide for twisters comprising a sizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, said die comprising a pair of similar sections each having a hardened insert in which one-half of the sizing opening is formed, means to hold said sections in assembled. relation, a stationary guide having openings uniformly spaced about a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for entrance into the mouth of said die, a ring in which said funnel mouth is formed, said ring having an annular groove, and a pair of vertically extending arms carried by the support and loosely and yieldably engaged in the groove of said ring at opposite sides of the ring.

7. A guide for twisters comprising a sizing die 3 adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, a stationary guide having openings uniformly spaced about a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for entrance into the :mouth of said die, a ring in which said funnel mouth is formed, said ring having an annular groove, and a pair of vertically extending arms carried by the support and loosely and yieldably engaged in the groove of said ring at opposite sides of the ring, said arms being formed of resilient material and anchored at their lower ends, the upper ends of the arms having inset portions spaced apart a distance less than the diameter of the ring at the base of the groove.

8. A guide for twisters comprising a sizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, said die comprising a pair of similar sections each having a hardened insert in which one-half of the sizing opening is formed, means to hold said sections in assembled relation, a stationary guide having openings uniformly spaced about a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for entrance into the mouth of said die, a ring in which said funnel mouth is formed, said ring having an annular groove, and a pair of vertically extending arms carried by ,the support and loosely and yieldingly engaged in the groove of said ring at opposite sides of the ring, saidarms being formed of resilient material and anchored at their lower ends, the upper ends of the arms having inset portions spaced apart a distance less than the diameter of the ring at the base of the groove.

9. A guide for twisters comprising a sizing die adapted to receive and compactly form a plurality of ends in preparation to twisting them in the form of a thread, said die comprising a pair of similar sections each having a hardened insert in which one-half of the sizing opening is formed, means to hold said sections in assembled relation comprising a stationary support having a socket to receive said sections, a pivoted cap for closing the top of the socket, means to hold said cap in closed position, and an adjustable spring-pressed member carried by the cap and engaging the adjacent die section, a stationary guide having openings uniformly spaced about a given axis aligned with the die opening for guiding said ends, and a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for entrance into the mouth of said die.

10. A guide for twisters comprising a sizing die adapted to receive and compactly term a plurality of endsin preparation to twisting them in the form of a thread, said die comprising a pair of similar sections each having a hardened insert in which one-half of the sizing opening is formed, means to hold said sections in assembled relation comprising a stationary support having a socket to receive said sections, a pivoted cap for closing the top of the socket, means to hold said cap in closed position, and an adjustable spring-pressed member carried by the cap and engaging the adjacent die section, a stationary guide having openings uniformly spaced about a given axis aligned with the die opening for guiding said ends, a rotatable and vertically movable funnel mouth disposed adjacent to and converging the ends for entrance into the mouth of said die, and guiding means for said funnel mouth including a yieldable element yielding of which permits removal or replacement of said funnel mouth.

WILLIAM RAYMOND FORD.

WILLIAM DEWHIRST. 

